Ability to use local js instead of CDN

I think because of restrictions and firewall on my work laptop whenever I try plotting anything in Juyterlab, I get the following error -

Error loading script: https://cdn.jsdelivr.net/npm//vega@5?noext

I can however download those vega js libraries and have them locally. So I was wondering if it is possible to configure altair to provide paths to local js libraries instead of using a CDN?

If not, then I’d like to help. Maybe we can have this as a configuration or subclass the code responsible for adding these CDNs to change the path to local files. Let me know the code that is responsible for that I would take a look.

[jakevdp]

You can do this in a couple ways: You can use altair_viewer for offline viewing on any frontend; see https://altair-viz.github.io/user_guide/display_frontends.html#altair-viewer. if you are on Jupyter Notebook or JupyterLab, another approach is to use the appropriate frontend extension (see https://altair-viz.github.io/user_guide/display_frontends.html#displaying-in-jupyterlab).

[jakevdp]

Frontend extensions are tricky (it’s one of the reasons we moved away from requiring them). Make certain you’ve installed the extension in the environment used by the kernel manager, not the kernel used by the runtime (though they are often the same) and be sure to restart your jupyterlab process after updating extensions. If you’re still having trouble gettig the extension installed, try asking in the Jupyter forums.